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fix IO_WAIT on send for builtin TLS and MbedTLS

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Sergio R. Caprile committed 2025-03-11 16:14:12 -03:00
1 parent 4eadf3699f
commit c1849c2b19
6 files changed
+142 -96
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src/tls_mbed.c
+10 -3
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@@ -190,9 +190,16 @@ long mg_tls_recv(struct mg_connection *c, void *buf, size_t len) {
long mg_tls_send(struct mg_connection *c, const void *buf, size_t len) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
long n = mbedtls_ssl_write(&tls->ssl, (unsigned char *) buf, len);
if (n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE)
return MG_IO_WAIT;
long n;
bool was_throttled = c->is_tls_throttled; // see #3074
n = was_throttled ? mbedtls_ssl_write(&tls->ssl, tls->throttled_buf,
tls->throttled_len) /* flush old data */
: mbedtls_ssl_write(&tls->ssl, (unsigned char *) buf,
len); // encrypt current data
c->is_tls_throttled =
(n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE);
if (was_throttled) return MG_IO_WAIT; // flushed throttled data instead
if (c->is_tls_throttled) return len; // already encripted that when throttled
if (n <= 0) return MG_IO_ERR;
return n;
}